radiant/environment.cpp

   1 /*
   2    Copyright (C) 2001-2006, William Joseph.
   3    All Rights Reserved.
   4
   5    This file is part of GtkRadiant.
   6
   7    GtkRadiant is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    GtkRadiant is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GtkRadiant; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include "environment.h"
  23 #include "globaldefs.h"
  24
  25 #include "stream/textstream.h"
  26 #include "string/string.h"
  27 #include "stream/stringstream.h"
  28 #include "debugging/debugging.h"
  29 #include "os/path.h"
  30 #include "os/file.h"
  31 #include "cmdlib.h"
  32
  33 int g_argc;
  34 char const** g_argv;
  35
  36 void args_init( int argc, char const* argv[] ){
  37         int i, j, k;
  38
  39         for ( i = 1; i < argc; i++ )
  40         {
  41                 for ( k = i; k < argc; k++ )
  42                         if ( argv[k] != 0 ) {
  43                                 break;
  44                         }
  45
  46                 if ( k > i ) {
  47                         k -= i;
  48                         for ( j = i + k; j < argc; j++ )
  49                                 argv[j - k] = argv[j];
  50                         argc -= k;
  51                 }
  52         }
  53
  54         g_argc = argc;
  55         g_argv = argv;
  56 }
  57
  58 char const *gamedetect_argv_buffer[1024];
  59 void gamedetect_found_game( char const *game, char *path ){
  60         int argc;
  61         static char buf[128];
  62
  63         if ( g_argv == gamedetect_argv_buffer ) {
  64                 return;
  65         }
  66
  67         globalOutputStream() << "Detected game " << game << " in " << path << "\n";
  68
  69         sprintf( buf, "-%s-EnginePath", game );
  70         argc = 0;
  71         gamedetect_argv_buffer[argc++] = "-global-gamefile";
  72         gamedetect_argv_buffer[argc++] = game;
  73         gamedetect_argv_buffer[argc++] = buf;
  74         gamedetect_argv_buffer[argc++] = path;
  75         if ( (size_t) ( argc + g_argc ) >= sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - 1 ) {
  76                 g_argc = sizeof( gamedetect_argv_buffer ) / sizeof( *gamedetect_argv_buffer ) - g_argc - 1;
  77         }
  78         memcpy( gamedetect_argv_buffer + 4, g_argv, sizeof( *gamedetect_argv_buffer ) * g_argc );
  79         g_argc += argc;
  80         g_argv = gamedetect_argv_buffer;
  81 }
  82
  83 bool gamedetect_check_game( char const *gamefile, const char *checkfile1, const char *checkfile2, char *buf /* must have 64 bytes free after bufpos */, int bufpos ){
  84         buf[bufpos] = '/';
  85
  86         strcpy( buf + bufpos + 1, checkfile1 );
  87         globalOutputStream() << "Checking for a game file in " << buf << "\n";
  88         if ( !file_exists( buf ) ) {
  89                 return false;
  90         }
  91
  92         if ( checkfile2 ) {
  93                 strcpy( buf + bufpos + 1, checkfile2 );
  94                 globalOutputStream() << "Checking for a game file in " << buf << "\n";
  95                 if ( !file_exists( buf ) ) {
  96                         return false;
  97                 }
  98         }
  99
 100         buf[bufpos + 1] = 0;
 101         gamedetect_found_game( gamefile, buf );
 102         return true;
 103 }
 104
 105 void gamedetect(){
 106         // if we're inside a Nexuiz install
 107         // default to nexuiz.game (unless the user used an option to inhibit this)
 108         bool nogamedetect = false;
 109         int i;
 110         for ( i = 1; i < g_argc - 1; ++i )
 111                 if ( g_argv[i][0] == '-' ) {
 112                         if ( !strcmp( g_argv[i], "-gamedetect" ) ) {
 113                                 nogamedetect = !strcmp( g_argv[i + 1], "false" );
 114                         }
 115                         ++i;
 116                 }
 117         if ( !nogamedetect ) {
 118                 static char buf[1024 + 64];
 119                 strncpy( buf, environment_get_app_path(), sizeof( buf ) );
 120                 buf[sizeof( buf ) - 1 - 64] = 0;
 121                 if ( !strlen( buf ) ) {
 122                         return;
 123                 }
 124
 125                 char *p = buf + strlen( buf ) - 1; // point directly on the slash of get_app_path
 126                 while ( p != buf )
 127                 {
 128                         // TODO add more games to this
 129
 130                         // try to detect Nexuiz installs
 131 #if GDEF_OS_WINDOWS
 132                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz.exe", buf, p - buf ) )
 133 #elif GDEF_OS_MACOS
 134                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "Nexuiz.app/Contents/Info.plist", buf, p - buf ) )
 135 #else
 136                         if ( gamedetect_check_game( "nexuiz.game", "data/common-spog.pk3", "nexuiz-linux-glx.sh", buf, p - buf ) )
 137 #endif
 138                         { return; }
 139
 140                         // try to detect Quetoo installs
 141                         if ( gamedetect_check_game( "quetoo.game", "default/icons/quetoo.png", NULL, buf, p - buf ) ) {
 142                                 return;
 143                         }
 144
 145                         // try to detect Warsow installs
 146                         if ( gamedetect_check_game( "warsow.game", "basewsw/dedicated_autoexec.cfg", NULL, buf, p - buf ) ) {
 147                                 return;
 148                         }
 149
 150                         // we found nothing
 151                         // go backwards
 152                         --p;
 153                         while ( p != buf && *p != '/' && *p != '\\' )
 154                                 --p;
 155                 }
 156         }
 157 }
 158
 159 namespace
 160 {
 161 CopiedString home_path;
 162 CopiedString app_path;
 163 }
 164
 165 const char* environment_get_home_path(){
 166         return home_path.c_str();
 167 }
 168
 169 const char* environment_get_app_path(){
 170         return app_path.c_str();
 171 }
 172
 173 bool portable_app_setup(){
 174         StringOutputStream confdir( 256 );
 175         confdir << app_path.c_str() << "settings/";
 176         if ( file_exists( confdir.c_str() ) ) {
 177                 home_path = confdir.c_str();
 178                 return true;
 179         }
 180         return false;
 181 }
 182
 183 #if GDEF_OS_POSIX
 184
 185 #include <stdlib.h>
 186 #include <pwd.h>
 187 #include <unistd.h>
 188
 189 #include <glib.h>
 190
 191 const char* LINK_NAME =
 192 #if GDEF_OS_LINUX
 193         "/proc/self/exe"
 194 #else // FreeBSD and OSX
 195         "/proc/curproc/file"
 196 #endif
 197 ;
 198
 199 /// brief Returns the filename of the executable belonging to the current process, or 0 if not found.
 200 char const* getexename( char *buf ){
 201         /* Now read the symbolic link */
 202         int ret = readlink( LINK_NAME, buf, PATH_MAX );
 203
 204         if ( ret == -1 ) {
 205                 globalOutputStream() << "getexename: falling back to argv[0]: " << makeQuoted( g_argv[0] );
 206                 const char* path = realpath( g_argv[0], buf );
 207                 if ( path == 0 ) {
 208                         /* In case of an error, leave the handling up to the caller */
 209                         return "";
 210                 }
 211         }
 212
 213         /* Ensure proper NUL termination */
 214         buf[ret] = 0;
 215
 216         /* delete the program name */
 217         *( strrchr( buf, '/' ) ) = '\0';
 218
 219         // NOTE: we build app path with a trailing '/'
 220         // it's a general convention in Radiant to have the slash at the end of directories
 221         if ( buf[strlen( buf ) - 1] != '/' ) {
 222                 strcat( buf, "/" );
 223         }
 224
 225         return buf;
 226 }
 227
 228 void environment_init( int argc, char const* argv[] ){
 229         // Give away unnecessary root privileges.
 230         // Important: must be done before calling gtk_init().
 231         char *loginname;
 232         struct passwd *pw;
 233         seteuid( getuid() );
 234         if ( geteuid() == 0 && ( loginname = getlogin() ) != 0 &&
 235                  ( pw = getpwnam( loginname ) ) != 0 ) {
 236                 setuid( pw->pw_uid );
 237         }
 238
 239         args_init( argc, argv );
 240
 241         {
 242                 char real[PATH_MAX];
 243                 app_path = getexename( real );
 244                 ASSERT_MESSAGE( !string_empty( app_path.c_str() ), "failed to deduce app path" );
 245         }
 246
 247         if ( !portable_app_setup() ) {
 248                 StringOutputStream home( 256 );
 249                 home << DirectoryCleaned( g_get_user_config_dir() ) << "netradiant/";
 250                 Q_mkdir( home.c_str() );
 251                 home_path = home.c_str();
 252         }
 253         gamedetect();
 254 }
 255
 256 #elif GDEF_OS_WINDOWS
 257
 258 #include <windows.h>
 259
 260 void environment_init( int argc, char const* argv[] ){
 261         args_init( argc, argv );
 262
 263         {
 264                 // get path to the editor
 265                 char filename[MAX_PATH + 1];
 266                 GetModuleFileName( 0, filename, MAX_PATH );
 267                 char* last_separator = strrchr( filename, '\\' );
 268                 if ( last_separator != 0 ) {
 269                         *( last_separator + 1 ) = '\0';
 270                 }
 271                 else
 272                 {
 273                         filename[0] = '\0';
 274                 }
 275                 StringOutputStream app( 256 );
 276                 app << PathCleaned( filename );
 277                 app_path = app.c_str();
 278         }
 279
 280         if ( !portable_app_setup() ) {
 281                 char *appdata = getenv( "APPDATA" );
 282                 StringOutputStream home( 256 );
 283                 if ( !appdata || string_empty( appdata ) ) {
 284                         ERROR_MESSAGE( "Application Data folder not available.\n"
 285                                                    "Radiant will use C:\\ for user preferences.\n" );
 286                         home << "C:";
 287                 }
 288                 else
 289                 {
 290                         home << PathCleaned( appdata );
 291                 }
 292                 home << "/NetRadiantSettings/";
 293                 Q_mkdir( home.c_str() );
 294                 home_path = home.c_str();
 295         }
 296         gamedetect();
 297 }
 298
 299 #else
 300 #error "unsupported platform"
 301 #endif